Me OMW (on my way) to cut open the cancer treatment machine and put a pellet of cobalt 60 in my mouth:

(The professor did not specify the kind of lab and the kind of equipment)

In an undergrad electronics lab class, the TA suggested I put the function generator leads on my tongue, and play with the parameters. Obviously I know what an applied DC voltage “tastes” like, but he suggested AC, sweeping the frequency. Sure enough, above a certain frequency (want to say 10s to 100s of Hz?), I couldn’t feel it at all.

Fun stuff.

Maybe not the ethidium bromide equipment though.

I chose the dirty pipettes from the organic chemistry lab!

I had both of these in A-level biology somehow. One week we were taught by the ex nurse who was constantly exasperated by us not knowing stuff like how coronary bypass surgeries are performed, and the next a former primary school teacher who would have us doing cutting and sticking exercises on ATP transfer or DNA sequencing. Neither particularly improved our understanding of biology.